/*
 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package com.sun.imageio.plugins.bmp;

import java.util.Locale;
import javax.imageio.spi.ImageReaderSpi;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.spi.IIORegistry;
import javax.imageio.spi.ServiceRegistry;
import java.io.IOException;
import javax.imageio.ImageReader;
import javax.imageio.IIOException;

public class BMPImageReaderSpi extends ImageReaderSpi {

    private static String[] writerSpiNames = { "com.sun.imageio.plugins.bmp.BMPImageWriterSpi" };
    private static String[] formatNames = { "bmp", "BMP" };
    private static String[] entensions = { "bmp" };
    private static String[] mimeType = { "image/bmp" };

    private boolean registered = false;

    public BMPImageReaderSpi() {
        super("Oracle Corporation", "1.0", formatNames, entensions, mimeType, "com.sun.imageio.plugins.bmp.BMPImageReader", new Class[] { ImageInputStream.class }, writerSpiNames, false, null, null, null, null, true, BMPMetadata.nativeMetadataFormatName, "com.sun.imageio.plugins.bmp.BMPMetadataFormat", null, null);
    }

    public void onRegistration(ServiceRegistry registry, Class<?> category) {
        if (registered) {
            return;
        }
        registered = true;
    }

    public String getDescription(Locale locale) {
        return "Standard BMP Image Reader";
    }

    public boolean canDecodeInput(Object source) throws IOException {
        if (!(source instanceof ImageInputStream)) {
            return false;
        }

        ImageInputStream stream = (ImageInputStream) source;
        byte[] b = new byte[2];
        stream.mark();
        stream.readFully(b);
        stream.reset();

        return (b[0] == 0x42) && (b[1] == 0x4d);
    }

    public ImageReader createReaderInstance(Object extension) throws IIOException {
        return new BMPImageReader(this);
    }
}
